<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html,body{
      width: 100%;
      height: 100%;
    }
    .header-container{
      width: 100%;
      background-color: #743;
      position: fixed;
      left: 0;
      top: 0;
      z-index: 1000;
      height: 2.5rem
    }
    .main-container{
      width: 100%;
      padding: 2.5rem 0;
      background-color: #eee;
    }
    .silder-container{
      height: 9.15rem;
      background-color: green;
    }
    .nav-container{
      height: 8.475rem;
      background-color: blue;
    }
    .recommend-container{
      height: 50rem;
      background-color: pink;
    }
    .tabbar-container{
      width: 100%;
      background-color: #643;
      position: fixed;
      left: 0;
      bottom: 0;
      z-index: 1000;
      height: 2.5rem;
      background-color: #666;
    }
  </style>
</head>
<body>
  <header class="header-container"></header>
  <div class="main-container">
    <div class="silder-container"></div>
    <div class="nav-container"></div>
    <div class="recommend-container"></div>
  </div>
  <div class="tabbar-container"></div>
 <script src="./simple.js"></script>
</body>
</html>